Composition for decoloring oils, fats, &amp;c., and process of making the same.



- UNITED STATES 1 1 -'roM.\sz MACHERSKI AND EDWARD KoPEnsKr, F BREST-LIT0YSK,' RUsSIA.'

comfrosrrron FOR'DEJCOLORING o'ILs, FA'rs, am am: PROCESS OF nrAKrNG THE'SAME.

Specincation of Letters Patent. Patented Sept. 29, 1908.

Application filed November 21, 1905. Serial No. 288,376.

To all whom it may concern:

Be it known that we, TOMASZ MACHER- SKI and EDWARD KOPEBSKI, both subjects of the Emperor of Russia, and residents of Brest-Litovsk, Russia, (post-oihce address Charisse street, Brest-Litovsk,l have invented certain new and useful Improvements in Compositions for Decoloring Oils, Fats, &c., and Processes of Making the Same, of which the following is a specificatron.

The present improvement consists in a novel composition for decoloring oils, fats, syrups, molasses, varnishes, rosins, petroleum products, alcohol, sugar solutions, etc.

In the use of the new composition, it is necessary only for the operator to pass the liquid to be cleansed through a body containing the new composition, or to have the ingredients of the new com iosition, either successively or as desired, ad ed to or mixed withthe body to be cleansed, and to then filter such body to separate therefrom the cleansing material and the impurities. The

ingredients of the new composition may be added singly or in combination. When the latter practice is desired. we may prepare our new composition as follows: 100 arts,

by wei ht, of pulverized bone-blac are treated y 50 parts or more of hydrochloric acid (H.CL) at a temperature of about 167 Fahrenheit, and then left to cool. The liquid art is then filtered, and the remaining soli part is washed with water at about 122 Fahrenheit, until all acid parts are removed and the washing liquid becomes uite-neutral. By this treatment, all phos ates and carbonates are entirely remove from the bone-black. This purified boneblack, after being dried, is intimately mixed with 1% to 7% of finely powdered zinc (ZN) and with 10% to of graphite, the quantity of these materials depending on' the degree of coloring matters to be removed from a given liquid. For decoloring sugar solutions and nutritious or edible oils it rs advisable to add also 0.1% to 1% of dry carbonate of sodium. The mixture thus prepared is the new composition of math-r designed for decoloring 'quids; and according to the experiments we have made it is suite-rent to use from1% to 10% of this mixture for decoloring almost any liquid.

It is to be observed that instead of boneblack other kinds of charcoal can be used, and that in most cases there will be no necessit .to treat them with hydrochloric acid; sti i the admixture of. graphite and Z1110 must-be made in about the same proportions.

For a composition to be employed 1n decoloring fats and oils, we take 7 to 2% of our com osition and'mix it with 100 parts of oil oriquid fat in an ap ropriate mixing apparatus at about 122 Fa renheit and for several hours. The mass is then filtered 1n filter resses, and the extracted oil is additional y pressed through a sheet of our composition, for which purpose we preferably use cylindrical filters. -'For'treat1 ng sugar syrups, molasses and-the like, it is almost sufficient to mix a syrup, etc. with our composition in a mixing apparatus at'the boiling temperature. It is only to be observed that the density of the syrup solution should notv be greaterthan about to Brix.

We are aware that the use of bone-black for decoloring oils and sugar solutions in general is not new. But the results attained by our composition are by far' more favorable, owing to the fact that we use bone-black free from all phosphates and carbonates, and urthermore the action of bone black is enhanced by addition of very active materials, as zinc and graphite.

Experiments made with our composition in sugar refining have proved that from sugar syrups treated b our composltlon a perfectly white sugar (ra ade) is obtalned, and that even from the II product a white sugar is produced and it: purity is greatly enhanced, 1ts glueyness being-on the contrary greatly reduced. For this reason the crystalhn tron of sugar in boiling (vacuum) apparatus is more easil attained, with a greater output of crysta e sugar. The treatment with our composition makes it ossible to do without the usual filtering t rough bone-black and also without the use of sulfurous acid, thus insuring a considerable economy of the process. A further advantage of our cpmposition is the possibility of its regeneration.

In fact, if after the treatment with our composition this latter be separated by filtration from the decolored liquid, and the residue well washed and filtered and calcined in a close vessel, the composition thus treated recovers completely its decoloring qualities and can be used for decoloring new quanti ties of liquid. Thus the loss is reduced to that unav'oidably remaining with. the particles in the residues of various operations.

.. ment of oils can be freed The composition rema' after the treatom the particles of oil b treating it with benzin or by mechanica y presscomposition is ca cined 111 closed vessels for its regeneration. I

The improved process for clarifying and decoloring liquids, may be carried out by the simultaneous reaction of carbon (preferabl purified and neutralized powdered charcoa and zinc powder; the carbon and the zinc may be added together, or separatel in such proportion and order desired. Simi arl the gra hite, which may sometimes be dispensed with may be added as an original part of the composition,,or se arately, and in such proportions and at sue times as desired. Again, especially when the edible fluids (such as saccharine solution, edible oils, and the like) are to be clarified the carbonate of soda may be added with the rest of the ingredients or separately.

We claim as our'invention:

1. A composition for decoloring oils and otherliquids, consisting of previously (purified bone black mixed with finely pow ered zinc.

2. A composition for decoloring oils and ofi the oil, whereafter the.

other liquids, consistin of an intimate mix ture of previously purl ed bone black, finely powdered zinc and graphite.

3. A composition for decoloring oils and other liquids, consistin of an intimate mixture of previously'puri ed bone black, finely powdered zinc, graphite and dry carbonate of soda.

4. A composition for decoloring oils and other liquids, consistin of an intimate mixture of previousl puri ed and neutral boneblack mixed wit finely owdered zinc.

5. The process of ma 'ng a composition for decoloring oils and other liquids, consisting in mixing bone black with hydrochloric acid, filterin the mixture, neutralizing the remaining so 'd material and mixing graphite andfinely powdered zinc with the neutral body aforesaid.

In testimony whereof, We have signed our names to this specification in the presence of two subscribing witnesses.

TOMASZ MACHERSKI, EDWARD KOPERSKI. 

